Automatic stop mechanism for metal-working machines.



No. 654,659. Ptented July 3|, I900. F. MABGGBA-FF.

AUTOMATIC STOP MECHANISM FOR- METAL WORKING MACHINES.

(Application filed Feb. 24, 1899.) (No Model.) 4 Sheets-Shoot I.

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Patented Iuly 3|, 1900.

F. MARGGBAFF. AUTOMATIC STOP MECHANISM FOR METAL WORKING MACHINES.

(Application filed Feb. 24, 1899.)

4 Sheets-Sheet '2.

4 h I /nm 4M A ATTORNEYS IN'VEN OR No 654,659. Patented luly 3!,1900 r.MARGGRAFF.

AUTOMATIC STOP MECHANISM FOR METAL WORKING MACHINES.

A (Application filed Feb. 24, 1899.)

(No Model.)

4 Sheets-Sheet 3,

WITNESSES:

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No. 654,659. Patented July 3l, I900.

F. MARGGRAFF.

- AUTOMATIC STOP MECHANISM FOR METAL WORKING MAGHINES..

(Application tiled Feb. 24, 1899.)

WTNESSES': v I \mvemon A 3 M BYhMW a ATTOR NEYS THE uonms PETERS cc"Punmuwa. WASHINGYON. u. c.

FREDRICK MABG RAEE, 0E WATERBUEY, CONNECTICUT, ASSIGNOR, BY MESNEASSIGNMENTS, TO THE SIIoE HARDWARE COMPANY, OF SAME PLACE.

.AUTOMATIC ST0I MECHANISM FOR METAL-WORKING MACHINES.

sPEdIEIcA'rIon forming are of Letters Patent No. 654,659, dated Jul sl,1900. Application filed February 24, 1899- serl'al NO- (N0 model?)TO'aZZ whom it may concern.-

Beitknown that I, FREDRIOK MARCeRAEni a citizen of the United States,and a resident of Waterbury, New Haven count State of Connecticut, haveinvented certain new and useful Improvements in Automatic Stop Mechanismfor Metal-VVorking Machines, of

which the following is a full,"clear, and exact description.

My invention relates to automatic stop mechanism more particularlyadapt-ed for 1netal-working machines, though obviously the invention maybe made use of in other'ma' chines where an application thereof would befeasible.

The object of said invention is to produce a simple and efficientmechanism for automatically stopping the machine in case the articlesmade by the machine are not properly discharged from the machine or ablank i'snot brought into exact register with the punch,

thereby preventing injury to the machine.

To these ends my invention consists in the novel arrangement andcombination of parts hereinafter described and claimed.

Reference being had to the accompanying drawings, wherein likecharacters indicate corresponding parts in the various views, Figure 1is a front elevation of a sufii'cient number of parts of a metal-workingmachine to illus- Irate my invention. Fig. 2 is a vertical sectionalview of the same, the said view being taken on the line 2 2 of Fig. 1and looking in the direction of the arrow in said figure. Fig. 3 is ahorizontal sectional view of a portion of the machine, the view beingtaken on the line 3 3 of Fig. 4:. Fig.4 is a front view of a portion ofthemachine with parts broken away to better illustrate my invention, the

view being taken on the line 4 4 of Fig.3.

Fig. 5 is a' detail side view'of the hand-operated stop-lever to behereinafter described. Figs. 6 and 7 are side views of certain portionsof thehand-operated stop mechanism, which will be hereinafter described.

In the drawings, 1 represents the framing of the machine, which issupported upon a bed-plate 2. In this framing the operative parts of themachine are mounted. The main driving-shaft 3 is mounted in the uprightstandards of the frami n g, as indicated in Figs.

1 and 2, and is provided with a fiy-wheel 4;,

which is connected with a driving-pulley 5,

the fly-wheel and driving-pulley bein'g loosely mounted 1i pon thedriving-shaft. Projecting in the engaged position bya spring 9. It willthus be observed that when the latch or clutch Section? is in theengaged position between .the pins 6 the driving-shaft and pulley 5 willbe lockedto rotate together and the end of the clutch-section 7 willextend from the shaft,

as represented in Fig. 1 of the drawings.

Moving between the upright standards of the framing l is a gate orcross-head 10, which is operated by the main shaft through pitman- 7orods 11, which are connected to suitable eccentrics carried-upon themain shaft 3. The

' cross-head or gate 10 carries the punches 12,

which cooperate with dies 13 in dial-plates let,

which are adapted to be rotated around a 7 fixed central plate 15,carried by the bed-p1ate of the machine. There may be several punches 12for each dial-plate carried by the gate 10, and each punch may beadapted to perform a diiferent portion of the work to be accomplished.Thus one punch may be the blanking punch, a second a forming-punch,

and a third an assembling-punch. Suitable mechanism (not shown) isprovided for feed ,ing the material to the punches, and the dial",plates'are intermittently operated after each downward movement of thepunches to bring successive pockets and the blanks carried therein tothe punches to be operated upon.

The mechanism for intermittently moving the dial-plates is clearlyrepresentedin Figs. 3 and 4 of the drawings, wherein horizontal movableslides 16 are mounted in the machine and are normally maintained intheo'ut'e rmost position by coiled springs 17, one end of each 5 ofwhich is connected to a slide, as indicated at 18, the other end'ofeach'ofsaid springs being united to a fixed portion of the framing ofthe machine, as indicated at 19. Each of these slides carries anantifriction-roller 20, against which the links 21 are adapted to hear.The links 21 are pivoted to the bedother is freeto move, as will' behereinafter otally connected to a link 35.

plate of the machine, as indicated at 22, and the upper end of each ofthese links is provided with an antifriction-roller 23, as indicated inFig. 3. Cooperating with the antifriction-rollers 23 of the links 21 arecams 24, which are carriedby the gate or cross-head 10, so that thelinks are moved toward each other at each downward movement of the gate,and the links bearing against the antifriction-rollers 20 of the slides16 will cause them to be forced toward each other and against thetension of their springs 17. .Eachof the slides 16 is pivotallyconnected to a link 25, which links are connected, as indicated at 26,to a pivot which extends into a slot'27 in an extension projecting fromthe bed-plateof the machine. These links 25, connected in the mannerdescribed, will cause the machine to be stopped if one of the dial-.plates is prevented from moving while the explained. Each of the slides10 is provided witha spring-pressed'pawl 28,which is adapted to engagein apertures 29 in the periphery of each of the dial-plates 14, whichconstitute the feeding device for the blanks, so that an outwardmovement of the slides from the center toward the ends of the machinewillca'use the dial-plates to be rotated a predetermined distance tobring the openings or pockets in the dial-plate into register with theircooperating punches. Centering springpressed pawls 30 are mounted on thebed-plate of the machine, and one of such pawls cooperates with each ofthe dial-plates 14,- as indicated in Fig. 3, to maintain the dial-platein the position into which it has been moved by the feeding mechanism.The cam-like projection 31 of each of these centering-pawls engages inan aperture 29 in the periphery of the dialplate, but is adapted to beforced therefrom against the tension of the spring of the pawl when thefeed mechanism is operated or the pawls may be otherwise operated.

Projecting from the bed-plate ofthe ma-' chine are brackets 32, in whicha rock-shaft 33 is mounted. To this rock-shaft is rigidly connected anarm 34, whichin its turn is piv- The upper end of the link 35 isprovided with an antifrictionroller 36, which is adapted to bear upon acam 37. This cam 37 is connected so as to rotate witha gear-wheel 38,and the gear-wheel'38 meshes with a cooperating gear 39, carried on themain shaft 3 of the machine. The link 35 is likewise apertured near itsupper end, as indicated at 40,,and through this aperture projects apin,which in the present instance consists of the auxiliary shaft 41, uponwhich the cam 37 is mounted. By this construction it will be observedthat the link 35 is free to move independently of the cam 37 and reachesthe lowermost position by its own Weight, whereas the cam 37 operates topositively -forcethelink'into the raised position. It will likewise beseenthat when the link 35- is maintainedelevated to the highest portionof the i cessively to the punches.

cam 37 the said cam may continue to" revolve without affecting the link35 or the parts connected therewith.

To the rock-shaft 33 are rigidly connected a pair of arms 42, whichextend toward the dial-plates 14, and each of these arms is providedwith a finger at the outer extremity thereof that is adapted to bereceived in suitable apertures, which in the present instance consist ofthe pockets of adial-plate as said dial-plate is rotated to bring thepockets sucit extends into the pockets of a dial-plate, should sink to apredetermined depth therein.

"I likewise rigidly connect with the rock-shaf t 33 an arm'43, whichisadapted to bear against one arm of a bell-crank lever 44, which is normally maintained in the position represented in Fig. 2 by a coiledspring 45. The other arm of this bell-crank lever 44 is provided at itsupper end with a cam 46, upon which-bears an antifriction-roller 47,carried by a gravity slide 48, which slides in a projection49, extendingfrom one side of the framing of the machine. An abutment 485 projectsfrom one side of this slide and cooperates with the notched portion 51of the lever 51 to support the slide in the elevated position. The upper5 end of this slide project's above the extension 49 of the framing andcarries a cam-abutment 50, which is adapted to be projected into theThis finger, when path of the free end of the clutch-section- 7 todisconnect the clutch. The bell-crank lever 51, which is shown in detailin Fig. 7 of the drawings, is pivoted to the framing of themachine andis connected byone arm to a coiledspr'ing 52, and isv provided with apin 53, which ex tends into a slot 54 of a cooperating bell-crank lever55. This bell-crank lever 55. is pivoted to the'extension 49 of theframing and a handoperated lever 56 is provided with an extension 57,that is adapted to bear upon the arm 55 of said lever 55 and maintainthe parts in the position represented in Fig. 2 against the tension ofthe spring 52. It will be understood that when hand-operated lever .56is turned upon itspivot from the position represented in Fig. 2 thespring 52 will force the lever 51 to a position where the notchedportion 51 thereof will be brought under the abutment 58 of the slide 58when the slide is elevated and to maintain the slide in the elevatedposition. Byreas'on". of the fact that the slide 48 is disconnected fromthe intermediate mechanism between the slide and the fingers on the arms42 said slide may be maintained in the elevated position by thehand-operated mechanism without affecting the automatic operation ofsuch intermediate mechanism and the slide may be operated automaticallywithout affecting the hand-operated mechanism.

Having described the general construction of one form of apparatusembodying my in? vention, I will now proceed to describe the operationthereof.

the abutment 48 any suitable manner to the blanking-punches, and if theblank has been properly cut and the operation of the parts is correct inevery detail the blank will be automatically conveyed by a dial plate tothe succeeding punches and will be finally brought to the assembling orclosing punches, from whence the completed article may be discharged.If, however, for any reason the dial-plates be improperly fed, so thatany one of the punches is not in exact register with a cooperatingopening or pocket in the dial-plate, the finger carried by the arm 42,which cooperates with this dial-plate, willnot pass into a pocket, butwill rest on the upper surfaces of the dial-plate, and the arms willthus be maintained in an elevated position. This will prevent therock-shaft 33 from turning to a position where the arm 43 will allow thelowest portion of the cam 46 of the lever 44 to be reached. In otherwords, the rock-shaft will be held in a position where the slide 48 ismaintained on the highest portion of the cam 46, and the cam-abutment50, connected to the upper end of the slide 48, will be maintained inthe path of the clutch-section 7, so that as the free end thereof isrotated with the shaft and driving-pulley into contact with the cam 50the clutch-section willbe automatically thrown out of engagement withthe pins 6 with whichit cooperates and the driving-pulley and thefly-wheel 4 will be allowed to rotate independently of the main shaft,

. thus stopping the machine before thepunches have an opportunity todescend. It will be understood that motion is transmitted to therock-shaft 33 to bring about this movement of the parts by the link 35,which is elevated at each complete revolution of the gear 38 by the cam37 connected therewith and drops to the lowermost position by its ownweight. When the link 35 is maintained in the elevated position by afinger on arm 42 contacting with the upper face of the dial-plate, theroller 36 on said link 35 will be maintained above the highest portionof the cam 37, so that the cam may continue to rotate without in any wayafiecting the link 35 and the parts connected therewith. Instead of thefingers on the levers 42 passing into the blank-receivin g pockets oropenings they may pass into separate openings provided for this purpose,though I prefer to have the fingers pass into the blankreceivingopenings, as additional advantages are derived thereby. Should theoperator desire to stop the machine by hand, it is merely necessary toshift the hand-operated lever 56 from the position illustrated in Fig. 2of the drawings, and thereby release the lever 55, when the tension ofthe spring 52 will force the notch 51 of the lever 51 to a point whereof the slide 48will rest on the upright arm of the leverol, and willthus prevent the slide 48 from reachingits lowermost position. In otherwords, it will maintain the slide in the position to which it has beenelevated by the highest portion of the blank and the effect will be thesame as pocket when said opening though the finger were maintained onthe up per face of a dial-plate and the machine will be immediatelystopped before the punch which cooperates with said pocket is depressedto operate upon the article.

It sometimes occurs that a blank will become jammed between a pocket inone of the dial-plates and the trackway ofsaid dialplate or between apocket and one of the dies, so as to prevent that particular dial-platefrom being moved by its feed-pawl, while the other dial-plate, beingfree from obstruction, will be fed regularly in the ordinary manner. Theresult of this would ordinarily be to have the punches of the jammeddial-plate work continuously in the same pockets, but without necessaryinjuryto the machine, while the other dial-plate would be intermittentlyoperated to carry the blanks around tothe. assembling or closing punch.'It will be 013-,

served that in this' manner many buckles might be destroyed before theattention of.

the operator is directed to the fact that all of the parts are notworking properly and that buckles are being destroyed as a result. Forthis reason I have devised special mechanism to stop the machine in caseboth dial-plates are not fed to the same extent or in case one shouldbecome jammed, so as to be incapable of moving while the other is beingproperly fed. This mechanism comprises the links 25, which are connectedto the two slides 16.

Referring now to Fig. 3 of the drawings, let us suppose that theleft-hand dial-plate 14, which feeds the tongue of the buckle, has ibecome jammed in the position shown. When the slides 16, which form atoggle-joint, are moved from each other a short distance by the springs17, the pawl 28 will engage in an aperture 29 in the jammed dial-plateand further movement of the slide is prevented.

This will leave the parts in substantially the position shown in Fig. 3,and a further moveinent of the other slide tends to swing the pivot 26in the arc of a circle of which the pivot of the left-hand link 25 isthe center. The effect of this is to jam the pivot against theright-handwall of the slot 27, and. thus prevent all movement of theslide at the right hand sideof the machine as well as that at the left.The relation of the parts is such that when the dial-plates are stoppedin this manner a full portion of a dial-plate is. brought under thefingers of one of the levers IOO IIC

42andt-he clutch will be thrown and the machine stopped in the mannerhereinbefore described.

working machines. Itwill thus be seen thatif for any reasonthedial-plates are not properly fed to bring the pockets into exactregister with the punches the machine will be instantly stopped beforedamage to the machine can result and that if the blanks are not properlycontained in the pockets the machine will likewise be stopped .beforethe punches can descend to damage the machine. While I have shown anddescribed with considerable detail one form of mechanism embodying myinvention, I would have it understood that many changes may be made inthemechanism without departing from the spirit of my invention.

What I claim, and desireto secure by Letters Patent, is 1 V V 1. Thecombination of a plurality of punches one of which is a blanking-punch,means for automatically feeding sheet metal to said blanking-punch and afeeding device adapted to receive the blanks directly f rom saidblanking-punch and to feed the blanks to the successive punch, means foroperating the punches and mechanism for automatically throwing thepunch-operatin g mechanism out of operation when the blank-carryingportions' of the feeding device are out of register with the punches.

2. The combination of a plurality of punches, a plurality of feedingdevices, having a series of blank-carrying portions, which cooperatewith the punches, means for operating the punches, means forautomatically bringing the blank-carrying portions of the feedingdevices successively to their respective punches, mechanism forautomatically throwing the punch-operating mechanism out of operationwhen a blank-carrying portion of the feed device is out of register withthe punch; and means for preventing the movement of one of the feeddevices when another of said devices is maintained against movement.

The combination of a punch and a feeding device for feeding blanks tothe punch, means for operating the punch, automatically-operated stopmechanism for throwing the punch-operating mechanism out of operationwhen a blank in the feeding device is out of register with the punch andhandoperated means for controlling the automatically-operated stopmechanism. 7

4. The combination of aplurality of punches, a plurality of feedingdevices, each having a series of blank-receiving openings therein,

means for operating the punches, means for automatically bringing theblank-receiving openings in the feeding devices successively to theirrespective punches, automaticallyoperated stop mecha nism for throwing.the

punch-operating mechanism out of operation whenan opening in a feedingdevice is maintained out of register with the punch; means forpreventing the movement of one of the feed devices when another feeddevice is maintained against movement, and hand-operated means forcontrolling the automatically-operated stop mechanism.

5, The combination of a punch, a feeding device having a series ofblank-receiving openings therein, means for automatically bring= ingsaid blank-receiving openings successively to'the punch, means foroperating the punch, a clutch carried by a movable part of the machinefor controlling the punch-operating means, a finger adapted to be movedinto the openings in the feeding device, in-

termediate mechanism between said finger and the clutch, mechanism forautomatically moving said finger at each operation of the punch and forprojecting an abutment on the intermediate mechanism into the path of asection of the clutch and means for permitting the intermediatemechanism to remain inactive when the finger is prevented fromreachingthe full extent of its downward stroke.

6. The combination of a punch, a feeding device having a series ofblank-receivi ng openings therein, means for bringing said openingssuccessively to the punch, means for operatingthe punch, aolutch carriedby a movable part of I the machine for throwing the punch-operatingmeans out of operation, a finger adapted to be moved a predetermineddepth into one of the openings in'the feedingdevice at each operation ofthe punch if an opening is in register with the punch, intermediatemechanism between said finger and the clutch, mechanism forautomatically moving said finger and for moving a portion of theintermediate mechanism into the path of a member of the clutch and meansfor permitting the intermediate mechanism to remain inactive when thefinger is prevented from moving the predetermined distance into anopening in the feeding deviceand thereby causing the clutch to beautomatically released to stop the machine.

7. The combination of a punch, a feeding device having a series ofblank-receiving openings therein, means for operating the punch,mechanism for controlling the punchoperating means, anautomatically-operated finger adapted to be moved to a predetermineddistance into an opening in the feeding. device at each operation of thepunch and to automatically throw the punch-open ating-means out ofoperation, if the finger'is prevented from moving the predetermineddistance into the opening in the feeding device and hand-operated meansfor controlling said intermediate mechanism.

8. The combination of aplurality of punches, a plurality of dial-plates,each having a series of blank-receiving openings that are adaptplate;means for automaticallyso interposingthe abutment, during eachrevolution of the main shaft, meains controlled by-the dial-plate forautomatically maintaining the abutment in the path of theclutch-section, to disconnect the clutch, and means for preven ting themovement of one dial-plate when another dial-plate is maintained againstmovement.

9. The combination of a plu ralityof punches, one of which is ablanking-punch, means for automatically feeding sheet metal to saidblanking-punch, a dial-plate having a series of blankreceiving openingsthat are adapted to be successively fed to the punch, a maindriving-shaft for communicating motion to said punch, power-transmittingmeans codpcrating with said shaft, a clutch interposed between saidshaft and the power-transmitting means and adapted to rotate with saidshaft, an abutment adapted to be interposed in the path of a section ofthe clutch, means for automatically so interposing the abutment duringeach revolution of the main shaft, hand-operated means for maintainingthe abutment in the interposed position and means controlled by thedial-plate for automatically maintaining the abutment in the path of theclutch-section to disconnect the clutch.

10. The combination of a punch, a feeding device having a series ofopenings adapted to be successively fed to the punch, a maindriving-shaft for communicating motion to said punch, power-transmittingmeans cooperating with said shaft, a clutch interposed between the mainshaft'and the power-transmitting means, a finger and operativeconnections cooperating therewith, said finger being adapted to enter anopening in the feeding device solely by the weight of the parts, meansfor positively withdrawing the finger from the said opening andintermediate mechanism between the finger and the clutch, whereby theclutch may be automatically disconnected when the finger is maintainedout of an opening.

11. The combination of a punch, a feeding device having a series ofblank-receiving openings that are adapted to be successively fed to thepunch, a main driving-shaft for communicating motion to said punch,powertransmitting means cooperating with said shaft, a clutch interposedbetween the main shaft and the power-transmitting means and adapted torotate with said shaft, a finger and operative connections codperatingtherewith, said finger being adapted to enter an opening in the feedingdevice a predetermined distance by the weight of the parts, means forpositively withdrawing the finger from said opening, a movable abutment,intermediate mechanism between the finger and said abutment whereby theabutment will be automatically moved into the path of a section of theclutch when the finger is prevented from moving the predetermineddistance into the openings in feeding device,

12.- The combination ofa punch, a feeding device having a series ofblank-receiving openings that are adapted to be successively fed to thepunch, a main driving-shaft for communicating motion to said punch,powertransmitting means cooperating with .said

shaft, a clutch interposed between the main shaft and thepower-transmitting means and adapted to rotate with said shaft, a finger1 and operative connections cooperating therewith, said finger beingadapted to enter an opening in the feeding device by the weight of theparts, means for positively withdrawing the finger from said opening, amovable abutment, intermediate mechanism between the finger and saidabutment, said abutment being disconnected from the intermediatemechanism whereby the abutment will be antomatically moved into the pathof a section of the clutch when the finger is prevented from moving thepredetermined distance into an opening and handoperated means formaintaining the abutment in such position.

13. The combination of a punch, a feeding devicehaving a series ofblank-receiving openings that are adapted to be successively fed to thepunch, a main driving-shaftcommunt catin g motion to said punch,power-transmitting means cooperating with said shaft, a clutchinterposed between the main shaft and the power-transmitting means, arock-shaft, a finger carried thereby, which fingeris adapted to enteranopening in the feeding device, a link which is freely movable in onedirec tion connected to a rocking arm extending from said rock-shaft,means for positively moving said link in the opposite direction, anabutment adapted to be moved into the path of a section of the clutch,intermediate mechanism between said rock-shaft and abutment whereby whenthe finger is out of an opening in the feeding device the abutment willbe in the path of the clutch-section.

14. The combination of a punch, a feeding device having a series ofblank-receiving openings that are adapted to be successively fed to thepunch, a main driving-shaft for com mnnicating motion to saidpunch,power-transmitting means cooperating with said shaft, a clutchinterposed between the main shaft and the power-transmitting means, arock-shaft, a finger carried thereby, whichfinger is adapted toenteroneof the blank-receiving openings in the feeding device, a link whichis freely movable in one direction connected to a rocking arm extendingfrom said rock-shaft, means for positively moving said link in the formaintaining said abutment in the path of,

the clutch whereby whenthe finger is out of a blank-receiving opening orthe hand-oper? ated' mechanism is shifted,'the abutment will be in thepath of the clutch-section. 15. The combination of a plurality ofindependently-movable blank-apertured feeding devices, mechanism foroperating said feedmovement.

alinement, and means for preventing the movement of said operatingmechanism when one of said feeding devices is retained against 16. Thecombination of a plurality of revoluble blank-feeding devices, mechanismfor operating said feeding devices and means for jammingsaid operatingmechanism to prevent a movement thereof when one of the feeding devicesis retained against movement. 17. The combination of a punch, aplurality of revolubleblank-feeding devices there for, mechanism foroperating said feeding devices, means for preventing the movement ofsaid operating mechanism when one of said feeding devices is retainedagainst movement and mechanism cooperating with said feeding devices tostop the machine when a feed.- ing'device maintains a blank out ofregister with the punch.

18. The combination of a punch, a plurality of revoluble blank-feedingdevices therefor, mechanism for operating said feeding devices,meansforj ammin g said operating mechanism to prevent a movement thereof when1 one of said feed'ingdevices is retained against movement andinechanism cooperating with said feeding'devices to stop the machine whena feeding'device' maintains a blank out of register with the punch;

19; The combination of a plurality of 'movable blank-feedingplates,mechanism for operating said feeding-plates, toggle-linksconnected to said operating mechanism, a pin on said links and a groovedabutment in which said pin moves, whereby when one of said feedingdevices is retained against movement, ;the operating mechanismwill beprevented Ifrom-moving v ing devices, to bring apertures thereininto 20.The combination of a plurality of revoluble bIank feedin'g plates,mechanism for operating said feeding-plates, toggle-links connected tosaid operating mechanism, a pin on said links and a grooved'abutment inwhich ,said pin moves, whereby, when one of said feeding devices isretained against movement the pin will be jammed in the grooved abutmentand the operating mechanism will be prevented from moving. a

21. The combination of a punch, a plurality of revolnble blank-feedingplates therefor, mechanism for operating said feed-plates,-

toggle-links connected to said ope rating mechanism, a pin on saidlinks,a grooved abutment in which said pin moves, whereby when one ofsaid feeding devices is retainedagainst movement the operating mechanismwill be prevented from moving and mechanism cooperating with saidfeeding devices to stop the machine when a feeding devicemaintains ablank out of register with the punch.

FREDRICK MARGGRAFF.

"Witnesses: EMMA JUDGE, HENRY W. hdlNOR.

